diff --git a/tests/backends/test_vanilla_django_backend.py b/tests/backends/test_vanilla_django_backend.py
index 4e2bfec..8c09411 100644
--- a/tests/backends/test_vanilla_django_backend.py
+++ b/tests/backends/test_vanilla_django_backend.py
@@ -5,12 +5,12 @@
 
 from django.test import TestCase, override_settings
 from django.core.mail import EmailMessage, EmailMultiAlternatives
-from django.core.files.storage import storages
+from django.core.files.storage import default_storage
 from django.template import TemplateDoesNotExist
 from django.core import mail
 
 import pytest
-from mock import patch, Mock
+from unittest.mock import patch, Mock
 from anymail.message import AnymailMessage
 
 from templated_email.backends.vanilla_django import TemplateBackend, EmailRenderException
@@ -69,7 +69,7 @@ class TemplateBackendTestCase(MockedNetworkTestCaseMixin,
     template_backend_klass = TemplateBackend
 
     def setUp(self):
-        self.storage_mock = Mock(wraps=storages["default"])()
+        self.storage_mock = Mock(wraps=default_storage)()
         self.storage_mock.save = Mock()
         self.backend = self.template_backend_klass()
         self.context = {'username': 'vintasoftware',
diff --git a/tests/test_get_templated_mail.py b/tests/test_get_templated_mail.py
index 0a2f1a7..96ac3d7 100644
--- a/tests/test_get_templated_mail.py
+++ b/tests/test_get_templated_mail.py
@@ -1,6 +1,6 @@
 from django.test import TestCase
 
-from mock import patch
+from unittest.mock import patch
 
 from templated_email import get_templated_mail
 
diff --git a/tests/test_send_templated_mail.py b/tests/test_send_templated_mail.py
index 0c77b7e..c37ae3f 100644
--- a/tests/test_send_templated_mail.py
+++ b/tests/test_send_templated_mail.py
@@ -1,6 +1,6 @@
 from django.test import TestCase
 
-from mock import patch, Mock
+from unittest.mock import patch, Mock
 
 from templated_email import send_templated_mail
 
diff --git a/tox-requirements.txt b/tox-requirements.txt
index 871945f..5f3db7b 100644
--- a/tox-requirements.txt
+++ b/tox-requirements.txt
@@ -2,7 +2,6 @@ django-anymail
 django-pytest
 django-render-block
 html2text
-mock
 pytest
 pytest-django
 pytest-pythonpath